Harley Twin Cam, 95 cu in, 3.875 bore, 4.000 stroke, 7.667 rod, 9.25:1 CR, 85cc head
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Harley Twin Cam, 95 cu in, 3.875 bore, 4.000 stroke, 7.667 rod, 9.25:1 CR, 85cc head
|
Make |
Harley Davidson |
|
Engine Size |
95 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.875 |
|
Stroke (in) |
4 |
|
Comp Ratio |
9.25:1 |
|
Dome CC |
-1.6 |
|
Comp Height |
1.265 |
|
Piston Part Number |
BHM5070 |
|
Conrod Part Nmber |
PSR6161 |
|
Pint Part Number |
927-2250-15CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
RS1660-3875-5THG |
|
Shelf (RPO) or Made to Order (MTO) |
ROP |
Proudly made in the USA by CP Carrillo Pistons!
- Fully CNC machined
- Balanced to +/- 1 gram
- Double forced pin oilers
- Forged from high strength 2618 alloy
- Designed for maximum performance, horsepower and reliability
- Complete kit includes two pistons, ring sets, wrist pins and clips
- Follow ring end gap and piston to cylinder clearances as per the supplied instructions
| Product Name | Harley Twin Cam, 95 cu in, 3.875 bore, 4.000 stroke, 7.667 rod, 9.25:1 CR, 85cc head |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
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What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What is the recommended bore clearance for the BHM5070 pistons?
For the BHM5070 pistons, a typical bore clearance of 0.0025" to 0.0030" is recommended. However, it's crucial to verify this with your specific engine setup, as clearances can vary based on factors such as temperature and intended use.
What type of wrist pins are included with the BHM5070 pistons?
The BHM5070 pistons come with high-strength wrist pins designed to withstand the demands of performance applications. Ensure proper fitment and lubrication during installation to maintain reliability.
What is the expected compression ratio with the BHM5070 pistons in a Harley Twin Cam engine?
The BHM5070 pistons are designed for a compression ratio of 9.25:1 when used with an 85cc head. This ratio is suitable for a balance of performance and reliability, but tuning and fuel quality will significantly impact engine performance.
Are the BHM5070 pistons suitable for high-performance applications?
Yes, the BHM5070 pistons are forged from high-strength 2618 alloy and are designed for maximum performance and reliability. They are ideal for high-performance builds, but ensure that your engine is properly machined and tuned to handle the increased demands.
What machining processes are necessary when installing the BHM5070 pistons?
When installing the BHM5070 pistons, ensure that the cylinder bores are honed to the correct clearance, and check that the ring gaps are set according to the supplied instructions. Additionally, confirm that the piston-to-cylinder clearances are appropriate for your specific engine configuration.
